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Compare the published Medicare service mix of Ivan Peter Harnden, M.D. with clinicians in the same registry specialty: Gastroenterology · Internal Medicine (CMS).

FAIRFAX, VA · Exact areaEdit location

2024 published service data · 22 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Neha Nigam, MD

Gastroenterology · Internal Medicine (CMS) · Fairfax, VA

Shared published services
3 shared services · view billing descriptions
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
  • Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)
75%Service-mix similarityView profile →

Charles Jun Huh, M.D.

Gastroenterology · Internal Medicine (CMS) · Fairfax, VA

Shared published services
3 shared services · view billing descriptions
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
  • Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)
75%Service-mix similarityView profile →

Richard Allen Blosser, M.D.

Gastroenterology (CMS) · Fairfax, VA

Shared published services
3 shared services · view billing descriptions
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
  • Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)
73%Service-mix similarityView profile →

Byungki Kim, MD

Gastroenterology (CMS) · Fairfax, VA

Shared published services
3 shared services · view billing descriptions
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
  • Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)
73%Service-mix similarityView profile →

Jeremias C Tan, M.D.

Gastroenterology · Internal Medicine (CMS) · Fairfax, VA

Shared published services
3 shared services · view billing descriptions
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
  • Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)
71%Service-mix similarityView profile →

Nitin Kumar Sardana, M.D.

Gastroenterology · Internal Medicine (CMS) · Fairfax, VA

Shared published services
3 shared services · view billing descriptions
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
  • Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)
70%Service-mix similarityView profile →

Ahmed Hegab, M.D.

Gastroenterology · Internal Medicine (CMS) · Fairfax, VA

Shared published services
3 shared services · view billing descriptions
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
  • Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)
70%Service-mix similarityView profile →

Vishant Aswin Ramadorai

Gastroenterology (CMS) · Fairfax, VA

Shared published services
3 shared services · view billing descriptions
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
  • Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)
69%Service-mix similarityView profile →

Asma Khapra

Gastroenterology (CMS) · Fairfax, VA

Shared published services
3 shared services · view billing descriptions
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
  • Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)
66%Service-mix similarityView profile →

Behzad Kalaghchi, M.D.

Gastroenterology (CMS) · Fairfax, VA

Shared published services
3 shared services · view billing descriptions
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
  • Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)
66%Service-mix similarityView profile →

Nader H Balba, MD

Gastroenterology (CMS) · Fairfax, VA

Shared published services
3 shared services · view billing descriptions
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
  • Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)
65%Service-mix similarityView profile →

Jean Al Donet Mostacero, MD

Gastroenterology · Internal Medicine (CMS) · Fairfax, VA

Shared published services
3 shared services · view billing descriptions
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
  • Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)
64%Service-mix similarityView profile →
How this comparison works

We use the same calendar year of CMS Medicare Physician & Other Practitioners data for both providers. Published non-drug service counts are combined by HCPCS code across places of service. We apply log(1 + count), normalize the vectors, and compare them using cosine similarity.

Candidates share the reference provider’s current NPPES primary taxonomy and match the location you enter. We examine up to 500 candidates in NPI order, then show up to 12 with the highest positive similarity within that set. The score is not a percentile, medical recommendation, or prediction. Suppressed services are not estimated. Medicare fee-for-service data does not describe a provider’s entire practice.

Source: CMS Medicare Physician & Other Practitioners - by Provider and Service : 2024-12-01 · Published May 21, 2026.